Unlock instant, AI-driven research and patent intelligence for your innovation.

Base station and method for performing TDD base station uplink/downlink subframe configuration

Active Publication Date: 2015-04-02
DATANG MOBILE COMM EQUIP CO LTD
View PDF8 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides a method for configuring base stations for TDD uplink-downlink subframes to reduce interference and improve network performance. By clustering the base stations based on coupling losses between them, dynamic TDD subframe configurations can be adjusted and restricted to optimize performance. This helps to lower interference across time slots and enhance the overall performance of the network.

Problems solved by technology

The shortest frame configuration modification periodicity of 640 ms supported in the TD-LTE standard has failed to fully accommodate a dynamically variable demand for traffic.
In a real system, if TDD subframes are configured dynamically so that different cells are preset with different uplink-downlink subframe configurations, then interference across time slots may occur with adjacent cells.
As can be apparent, the problem of interference across time slots accompanying the solution to dynamic configuration of TDD subframes proposed in the prior art has not been addressed yet, thus degrading the performance of the system; and taking a cell as an example, interference thereto in each uplink subframe may be uplink interference of a UE served by an adjacent base station or may be downlink interference of the adjacent base station.
If the interference thereto arises from downlink interference from the adjacent base station at a short distance from a cell in question, then there may be strong interference of the adjacent base station to the cell in question, thus possibly resulting in significant interference to the uplink subframe in the cell in question and consequentially deteriorating the performance of the system.
As a result, the performance of the system can not be guaranteed with the traditional dynamic configuration of TDD subframes.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Base station and method for performing TDD base station uplink/downlink subframe configuration
  • Base station and method for performing TDD base station uplink/downlink subframe configuration
  • Base station and method for performing TDD base station uplink/downlink subframe configuration

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0063]The present embodiment relates to the centralized management scheme, and particularly the step 601 and the step 602 are performed by the upper node of all the base stations, where the upper node transmits indication information including the results of clustering to each base station so that the respective base stations in the preset region configure TDD uplink-downlink subframes according to the results of clustering, where base stations in the same cluster are configured with the same TDD uplink-downlink subframe configuration, and base stations in different clusters are configured with the same TDD uplink-downlink subframe configuration or different TDD uplink-downlink subframe configurations.

[0064]Preferably in the step 602, the upper node clusters the base stations in the preset region according to the coupling loss between every two of the base stations particularly as follows:

[0065]For each base station, the base station is classified into a cluster, and it is judged wh...

second embodiment

[0152]The present embodiment relates to the centralized management scheme, and particularly the step 601 and the step 602 are performed by the specified base station or any base station in the preset region, and furthermore the specified base station or any base station transmits indication information including the results of clustering to the respective other base stations than the specified base station or any base station in the preset region so that the other base stations in the preset region configure TDD uplink-downlink subframes according to the results of clustering, where base stations in the same cluster are configured with the same TDD uplink-downlink subframe configuration, and base stations in different clusters are configured with the same TDD uplink-downlink subframe configuration or different TDD uplink-downlink subframe configurations. And the specified base station or any base station configures TDD uplink-downlink subframes according to its obtained results of c...

third embodiment

[0203]The present embodiment relates to the distributed management scheme, and particularly the step 601 and the step 602 are performed in coordination by all the base stations, where for any base station in the preset region, particularly the base station determines the coupling loss between the current base station and each of other base stations and clusters the current base station according to the coupling loss between the current base station and each of other base stations as follows: the current base station is classified into a cluster, and it is judged whether to classify each of other base stations into the cluster where the current base station belongs, according to the coupling loss between the current base station and each of other base station, as a result of clustering of the current base station; and TDD uplink-downlink subframes are configured according to the results of clustering obtained by the current base station.

[0204]Preferably for any base station, the coup...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a base station and a method of configuring TDD uplink-downlink subframes for base stations, and the method includes: determining a coupling loss between every two of base stations in a preset region; clustering the base stations in the preset region according to the coupling loss between every two of the base stations; and the base stations configuring TDD uplink-downlink subframes according to results of clustering, wherein the base stations in the same cluster are configured with the same TDD uplink-downlink subframe configuration, and the base stations in different clusters are configured with the same TDD uplink-downlink subframe configuration or different TDD uplink-downlink subframe configurations. The invention can lower interference across time slots due to flexible configuration of TDD subframes and optimize the performance of a TDD network system.

Description

[0001]This application claims the benefit of Chinese Patent Application No. 201210048151.5, filed with the Chinese Patent Office on Feb. 27, 2012 and entitled “Base station and method of configuring TDD uplink-downlink subframes for base stations”, which is hereby incorporated by reference in its entirety.FIELD OF THE INVENTION[0002]The present invention relates to the field of wireless communications and particularly to a base station and a method of configuring TDD uplink-downlink subframes for base stations.BACKGROUND OF THE INVENTION[0003]For basic duplexing schemes adopted in a cellular system, as illustrated in FIG. 1, a Time Division Duplexing (TDD) mode refers to transmission of uplink-downlink signals in the uplink and the downlink in different periods of time over the same operating frequency band, where there is a Guard Period (GP) between the uplink and the downlink; and a Frequency Division Duplexing (FDD) mode refers to possible transmission of uplink-downlink signals ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H04W16/00H04J3/10H04W24/02H04W72/04
CPCH04W16/00H04W72/0426H04W24/02H04W72/042H04J3/10H04W72/0413H04B7/2656H04W92/20H04W16/10H04W88/08H04W72/21H04W72/23H04W72/27
Inventor LIU, MEIPAN, XUEMINGSHEN, ZUKANG
Owner DATANG MOBILE COMM EQUIP CO LTD